Dark fur (5)
I believe the answer is:
sable
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dark fur</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for sable that I've seen before include "Literary black" , "Marten's fur - dark black" , "Fur from member of weasel family" , "Fur - heraldic black" , "Bales of rich fur" .)